The store-and-forward network consisting of all
the world's connected Unix machines (and others running some clone
of the UUCP (Unix-to-Unix CoPy) software). Any machine reachable
only via a bang path is on UUCPNET. This term has been
rendered obsolescent by the spread of cheap Internet connections in
the 1990s; the few remaining UUCP links are essentially slow
channels to the Internet rather than an autonomous network. See
network address.